Sandor, I realize that I forgot to answer the cost aspect of your question. I want to be sure that you get a trustworthy answer so I asked my husband, who is a general contractor, to read over your question. He estimates that you could expect to pay around $1,500 including materials and installation for a skylight. The solar tube may run $400. Apparently the solar tubes vary in cost according to the size that you select. These are ballpark estimates because conditions found affect the exact cost. Here's hoping that things turn out just as you invision.